Win dow-blin d



UNITED STATES PATENT OFFICE.

ALONZO S. GRENVILLE, OF CAMBRIDGE, AND THOMAS JOHN LEWIS, OF BOSTON,MASSACHUSETTS.

WINDOW-BLIND.

Specication of Letters Patent N0. 1,279, dated August 9, 1839.

To all whom t may concern Be it known that we, ALONZO S. GREN- viLLE, ofCambridge, county of Middlesex and State of Massachusetts, chemist, andTHOMAS JOI-IN LEWIS, of Boston, county of Suffolk, in said State ofMassachusetts, bookbinder, have invented a new and useful Tmprovement inBlinds; and our said invention or improvementis by us plainly and fullyspecified and set forth in the words and figures following, which may bebest understood by referring to the drawings herewith annexed, to wit:

Figure l, letter A'represents the wall of a building. B represents awindow-frame which must be flush with the wall, in order to permit theblinds to run on their railway, nearly close to the wall withoutobstruction. C, C, represents a strip of wood-or bar of metal, which ismade to project from the wall by blocks D, D, D a suiiicient distance toclear the blinds from the wall, when in the action of closing orunclosing and iS what we call the railway, the upper side of which is tobe rounded in Order to receive the grooved rollers. e, e, c, e,represents the grooved rollers, mortised in the lower corners of theblinds. F, F represents blinds placed on either side of a window andresting on the railway C, C. g, g, g, g represents pegs or rollersaflixed to the back of the upper ends of the blinds, to keep them intheir proper places, and to permit them to move easily within the upperrailway H, H. H, H, represents the upper railway and is made similar tothe lower one C, C, with the exception, that it has a strip of wood, tomake the distance of the blind, at top, equal to the distance from thewall at bottom, and serves to prevent rain or snow from impeding themovement of the blinds. I, I, represents two horizontal pulleys placedin the window frame-outer sideand serves to conduct the cords K, K, K,K, which are fastened to each side piece of the blindsover thempthroughthe window-frame, and then over the two perpendicular pulleys M, M.,Plate 2nd, inside the building. The blind L, Fig. l, as seen through asquare of glass, is added for the purpose of showing, more clearly, theaction of the cords in drawing back the blinds after they had beenclosed, for which purpose also the slats have been omitted.

P, P, P, P, Fig. 2, represents the horizontal pulleys, which are to beplaced on the outer side of the window frame, opposite to the inner sideperpendicular pulleys M, M, N, N. M, Fig. Q, represents one of theperpendicular pulleys, so placed that the cord R will pull in a. directline by passing over the periphery of it, through the window frame overthe periphery of the left hand side of the upper horizontal pulley P,from thence it is to be passed along and fastened at S to the right handside of the blind T, Fig. 2, then (by pulling the cord R) the blind willmove to the left hand side of the window (faintly represented by dottedlines, as seen through the wall) the closing is managed by fasteninganother cord U on the left hand side of the blind t, Fig. 2, so that itwill be in a directI line with the right hand side of the lowerhorizontal pulley P, over which it is to pass through the window frame,thence over the lower perpendicular pulley N, pull the cord V and theblind t will be closed.

N, N, Fig. l, represents two Scrapers attached to the lower ends of theblinds for the purpose of removing snow, should any lodge on the edge ofthe railway.

The advantages of these blinds over those in general use are several,viz, 1st. They can be closed and unclosed without the window beingopened by drawing the cords K, K, K, K, Fig. 2, inside the room. 2nd.They are not so liable to be broken by getting loose, as they are keptsteadily in place, by the upper and lower railways. 3rd. The light ofthe room can be more easily regulated by the railway, than by the commonblinds.

lVhat we claim as our invention, and desire to secure by Letters Patent,is-

The method of opening and closing blinds oy means of the combinations ofpulleys, cords, and sliding blinds, in the manner herein described.

In testimony that the above is a true specification of our invention orimprovement, we have hereunto set our hands this tenth day of Septemberin the year of our Lord one thousand eight hundred and thirty-eight.

A. S. GRENVILLE. THOMAS JOHN LEWIS.

L. s. [11. S]

